Unit ……. Flashcards
1
Q
What is an electron volt?
A
Amount of kinetic energy gained by a single unbound electron when it accelerated through an electrostatic potential difference of one volt.
2
Q
What is plank’s constant
A
6.63x10^-34 JS
3
Q
What is ionisation?
A
When an atom loses an orbiting electron.
4
Q
What is excitation?
A
An electron is raised to a higher level but remains within atom.
5
Q
What is meant by the term ground state?
A
Lowest energy level of an atom
6
Q
What does an excited state mean?
A
When one or more of an atom’s electrons moves to an outer shell at higher energy. An energy input raise the electrons to a higher energy level.
7
Q
What is a photon?
A
A photon is a particle of electro-magnetic radiation, the energy of which is directly proportional to its frequency.
